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From "ryan rawson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1502) Remove need for heartbeats in HBase
Date Tue, 09 Jun 2009 04:48:08 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12717553#action_12717553
] 

ryan rawson commented on HBASE-1502:
------------------------------------

right now the master makes assignment decisions during the 'check in' RPC.  Basically the
master doesn't proactively assign regions, instead it passively waits for regionservers to
call the master.

We'd also need new RPC so a master can be much more proactive about assigning regions.  This
could reduce assignment time by seconds (!).



> Remove need for heartbeats in HBase
> -----------------------------------
>
>                 Key: HBASE-1502
>                 URL: https://issues.apache.org/jira/browse/HBASE-1502
>             Project: Hadoop HBase
>          Issue Type: Wish
>            Reporter: Nitay Joffe
>             Fix For: 0.20.1
>
>
> HBase currently uses heartbeats between region servers and the master, piggybacking information
on them when it can. This issue is to investigate if we can get rid of the need for those
using ZooKeeper events.

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